Antisiphon-trap.



G. W. SMITH. ANTISIPHON TRAP. APPLICATION FILED MAB.. 26, 1909.

X3? i Patented Jan. 4, 1910.

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INVENTOR Gy@ mlz WITNESSES UNTTED sTATEs PATENT oEEioE..

GEORGE W. SMITH, 0F PLEASANTVILLE, NEW JERSEY.

A NTISIPHON-TRAP.

To all whom it may concern:

Be it known that I, GEORGE WV. SMITH, a citizen of the United States,residing at Pleasantville, in the county of Atlantic and State of NewJersey, have invented a certain new and useful Improvement inAntisiphon- Traps, of which the following is a specification.

My invention relates to a new and useful improvement in anti-Siphontraps, for use in connection with bath-tubs and lavatories, and has forits object to provide an exceedingly simple and effective device of thischaracter which will prevent the trap from siphoning which would allowthe obnoxious gases to return through the pipes.

lith these ends in view, this invention consists in the details ofconstruction and combination of elements hereinafter set forth and thenspecifically designated by the claims.

In order that those skilled in the art to which this inventionappertains may understand how to maire and use the same, I will describeits construction in detail, referring by letter to the accompanyingdrawing forming a part of this specification, in which- Figure l is alongitudinal sectional view of my improved trap. Fig. 2, a section atthe line .fc-m of Fig. l looking in the direction of the arrows.

In carrying out my invention as here embodied, A represents the body ofthe trap, having an extension B formed therewith. In the upper part ofthe extension B is formed the inlet opening C, to which may be attacheda suitable inlet pipe C.

In the rear of the body A is formed an outlet opening D whereby anoutlet pipe may be attached to the trap, the bottom of said openingbeing above the opening C.

Attached to the body of the trap at some suitable point and extendinginward is an air inlet pipe E, the inner end of which is bent at rightangles to the rest of the pipe so that it will be in a verticalposition, as indicated by F, and on this end are formed the male threadsG, which are adapted to engage the female threads H formed on the lowerend of the valve seat I, into which ts the valve J.

K denotes a dome provided with male Specification of Letters Patent.

Application filed March 26, 1909.

Patented Jan. 4, 1910.

Serial No. 485,923.

threads L adapted to engage the female threads M formed on the innersides of the upper end of the body of the trap A. In the Lipper' end ofthis dome is threaded a set screw ll, the lower end of which may bebrought in proximity to the'valve J so as to prevent the same fromleaving its seat I when the air is being drawn through the air inlet E.

In practice, the waste water will enter through the inlet C, passthrough the trap and out of the outlet D. As the water passes throughthe trap it will forni a vacuum therein which would allow the water tosiphon from the trap were it not for the inlet pipe E. Instead of avacuum being formed air will be drawn in through the air inlet E causingsufficient water to remain within the trap to prevent the obnoxiousgases returning through'the inlet C. IVhen a sufficient amount of airhas passed through the inlet E the valve J will at once return to itsseat I, thus cutting off the possibility of the gases escaping throughthe inlet pipe E.

Of course I do not wish to be limited to the exact details ofconstruction here shown as the air inlet pipe E may be of sufficientlength to extend through the wall of a building so that should there beany escape of the gases through the air inlet pipe E they would pass outinto the open air.

H aving thus fully described my invention, what I claim as new anduseful isl. In an anti-Siphon trap, the combination with a body providedwith an outlet and having an extension formed therewith provided with aninlet, internal threads formed on the upper end of the body, an airinlet pipe secured to the body, the inner end of said pipe being bent atright angles and having threads formed thereon, a valve seat havingthreads formed on the lower end thereof fastened to the air inlet pipe,a valve fitting the seat, a dome provided with external threads on itslower end adapted to engage the threads on the body and a set screwpassing through the dome for adjusting the rise and fall of the valve.

2. In an anti-siphon trap, the combination with a body provided with anoutlet and having an extension provided with an inlet,

of a dome detachzfoy secured thereto, an air l aflxed my signature n thepresence of two inlet pipe secured to the body, a Valve seat subscribingWitnesses. detaohably secured to the ail* inlet pipe, a Y valve fittingthe seat, and means attached to GEORGE W' SMITH; 5 the dome foradjusting the rise and fall of the Valve as specified.

In testimony whereof, I have hereunto Vtnesses:

ARTHUR P. RYoN, JoHN M. HILTON.

